| PROFLEX Specifications | ||||
| Size | Actual I.D. | Nominal I.D. | Max psi | Typical Use |
| -4 | 7/32" | 1/4" | 1000 | Small oil and fuel lines, fuel gauges, and vacuum lines |
| -6 | 11/32" | 3/8" | 1000 | Carburetor, fuel, and oil lines |
| -8 | 7/16" | 1/2" | 1000 | Fuel, oil, water lines |
| -10 | 9/16" | 5/8" | 750 | Fuel, oil, water lines, heater hoses |
| -12 | 11/16" | 3/4" | 750 | Fuel, oil, water lines, heater hoses |
| -16 | 7/8" | 1" | 750 | Fuel, oil, water lines, heater hoses |
| -20 | 1-1/8" | 1-1/4" | 750 | Fuel, oil, water lines |